You are omitting the first part of the story. After WWI, the Germans were laidened with with a level of war reparations that pushed them down the road to WWII. Repeating that mistake a second time could have been just as bad if not worse the second time around.
I didn't omit anything. Debt relief is debt relief. WWI reparations were only around 25% of their outstanding debt at the time. Half was Marshall plan and other post-war loans, not reparations. Debt relief essentially converted those loans to grants, putting them on footing similar to those who fought alongside us, not against us.